Safety device for doors



Dec. 19, 1922.

E. KARRENBEBG. SAFETY DEVICE FOR DOORS.

HLED FEB-10,1921.

4 u w a 0 w 0 a $1 I 0 n a O 0/ 0 "W y 0/ w a 1 0 M 1 I? I 1 J w J w d mu f Patented Dec. 1922.

'nwenn easements, [orc'ass'er, GERMANY.

d g f nation roe noons.

Application filed February 10, 1921. Serial 'No. 444,064.

To (all ir/ zom it may Concern:

Be it known that I, EWALD Kaannnnsne,

a citizen of the German Republic, residing at Casscl, Germany, have invented certain new and useful Improvements in Safety Devices for Doors, ofwhich the following a specification.

Safety devices comprise a nose arranged'at the edge of the door adaptedto engage .with the guide slot of a locking arm pivotallyj-fixed to :the door frame. Devices of this typepresent theinconvenience that they are not ready par- 1 ticnlarly when the house or flat is being left.

. This inconvenience is avoided according to this invention by providing an angle'ai'm pivotally mounted upon the door frame which forces the locking arm to adopt the locking position when-the door is being'shut,

this locking arm beingadapted to be pushed I back from the outside with the aid ofa key. When the door is being locked the parts which have been displaced by the key return to their normal positions. V

- In order that "the invention may be clearly understood, 1 shall proceed to describe the.

2 is a section on line A+B of Fig.

Fig. 4t shows in a similar View the device unlocked from the outside by means. ofa key, the locking arm being turned back and the door being opened, the several parts being shown in differentpositions, V a

5 is a side elevation of the device in position ready for working.

Fig. 6 shows the interior oi"i the lock in elevation, the outer cover plate. (89) being removed.

In connection with the rabbet of the door 5 a piece 22.pre'senting anose at and; further a p1ecel3 which is twice bent at right angles are fixed upon the base plate 21. Y A base plate 23 fixed-to the door frame- It carries a second plate'2 l. Upon this plate 24 a bracket 25 is provided in which a: vertical axle 33 for the locking arm 2 is located which has 'a longitudinal slot The slot for doors are known which- 7 door.

shown in Fig. 3. locking arm 2 automatically fromthe posiposition a; \ble a upper contact-mg 3 is a similar View asshown-in Fig.

P which, serves to guide and interlock was the nose 4 isinclined "towards the leftiesshown in Figure Ii. andhas a rectangular enlargement at the right hand end designed to permit the passage through of the nose l. Two guide faces 26,. 27 projecting i rom'the said enlargement serve to guide the upper :and lower projecting parts ofsaidfnose l upon the locking edges when the locking arm 2 is be ng moved by the opening or the releasing position of arm 2 is In order to='return the The door tion shown in Fig. 3 into th'e operative shown in Fig. 2 a helical. sprn1g28 is provided; which is wound around a pin 29 and bears with: its upper end against the supporting plate of a bracket 31 fixed upon the base plate 23, and with its lower. end against. acollar 32 onthe pin 29 which is freely rotatable, and longitudinally .displaceable in :the plate '30., This-pin, 29 restswit'h its lower point upon'the axle 330fthe locking arm 2. =1 The upperarm ofthe two fork-shaped arms 34:, 35 which embrace the bracket 25 is undercut. upon its lowerusuriface that islto say "it is provided with an inclined sur'tace'36. The

2 to the operative position shown in'Fig. 2 when the incline on thearm and bracket begin to register. Arm 2 will remain in surface of thebracket25 has correspondlng inclineaas shown in Fig. i 1, so, that thesprlng-28 acts "to swing arm inoperatve position when swung far enough i to the right tobring its incline 36 upon the level; surface of: bracket 25'as showhan Fig. 4.

An angle lever, 6, 7 mounted upon. the

of the locking armto operative or locking position by bringing the above" mentioned inclines into registration the arm 7 of said leverbeing turned by the rabbet "2O behind w-hich'the free end of said arm; engages, the other arm 6 ofsaid angle lever being bent so that its end reaches'intol close proximity with the locking armf2'. When the dooris being opened-and the locking bracket 25 serves for starting the movement arm 2 is pushed back the angle lever 6, 7

is brought into the proper position ior renewed operation as shown Fig. 4.

After the door has been closed and locked the locking arm 2 can be disengaged from the noseiet mounted upon the. rabbetu-20,

through the insertion of a key from the outside.- For this purpose a two-armed lever 8, 16 is provided whose arm 8 bears against the lockingarm 2 when the same is in its locking position (F ig'LQ) the other arm 16 of the lever engaging with akey operated actuating plate 38 which may be of any convenient construction.

In the form of construction illustrated it is sue )osed that the key inserted into the key pipe 9 of the lockoperates the tumblers 10 when it is being turned 1n clockwiseklirection (Fig. 6) in order to make the lever 8 16 SWIDO' around its Divot 11. The direca b l tions or movement which will behereinatter described relatealso to F 6. For Figures 1 to at the opposite directions are to be considered.

The key pushed into the key pipe 9' over the pin 40 moves, when being turned the actuating plate indentation ll of said bolt, lifting at the same time the pivoted tumblers 10 oil the, pin 43 mounted upon the actuating plate 258 g g g t notch. As soon asthe actuating plate reaches its extreme right hand position, the end 15 of a lever 49. winch is influenced by a' spring 12 (Fig; 5) and ywhichis adaptedto pivot around l8, grips behind the notchfil'ot the actuating plate 38 whereby the same is retained. The actuating plate 38 is guided by two rectangular slots 52, 53 with which engage pins 5 1. of corresponding shape. which are rigidly connected with the plate 23.

llhe free end 56 oi the lever arm .50 (Fig.

is'forkedfand carries a piece 57 adapted to pivot around the axle 14-, said piece being provided with a'nose 58 shown in the drawingasextending upwardly and provided at its lower end with a curve 59 and with a straight surface 60. The part of arm 50 which is situated between the fork-shaped arm 56 is formed so that when itpresses against the surface 60 the piece 57 can turn -'around the axle 14 only till the nose 5S buts against'theshoulder of said part of arm. 50

to drop back intoitsformer position by its i own weight (Fig.

When the parts are in the working positionshown in Figs. 1 and 2 or when the door is being loc kedand secured, the nose 4 will move inslot 3, when the door is being opened,

up tothe left hand end of said slot preventing thus the further opening of the comes in contact with the curved s no to the right against the NC-U011 of the spring L2 as it engages with the door. li however the door has tov be opened completely the locking arm2 lS brought by hand into the position shown in Fig. 4:, the piece 13 butting against the surface 60 (F 5) so that the piece 57 is turned and allows the unimpeded opening oi the door. ii hen the door is being closed, the rabbet 20 strikes against the lever arm 7 and mal r thus the lever 7,6 turn. The end 3? or said lever makes the locking arm 2 oscillate until the inclines on the arm 2 and bracket be to register when the swinging of arm 2 is completed by the spring 255. lfhe piece 13 CG o1) whenthe door is being closed and nits the lever arm 50, remaining however without efi'ect asat the opening of the door from the inside the actuating plate 31*; remains in its position of rest.

If new the secured door has to be opened from the outside, the actuating plate 38 is moved towards the right (F 6) whereby the end 15 is beingseeured. The actuating plate 38 moves through the intermediary oi' the lever 16, 8, thelocking arm 2 into the position Fig. 3 so that the door can be opened. l/Vhen the door is being closed the piece 13 presses against the surface 59 and releases the actuating plate 38 which is now driven into the position of rest through the action of the spring 42.

1. Asatety device for doors comprising in combination. a locking arm connected with the door frame, means for moving said lockingarm out'ot-its lockingposition by means of a keyinserted in the lock from the outside, .a'two-armed lever adapted to operate with one arm said locking arm, and'an actuating plate of the door lock having a slot with which the other arm'o't said two-arnunl lever engages. I

2. A safety device For 'doors comprising incombination a locking arm connected with the door frame, means for .nioving said locking arm out of its lockim: position by means of a key insertedin the look from the outside, said means comprising a two-armed lever adapted to operate with one arm said locking arm, and a'key operated actuating plate of the door lock having a slot with which the other arm or said two-armed lever engages, spring influenced lever automatically retaining said actuating plate inopei' ative position and a piecefixedto the door and designed to act upon said spring in fluenced lever when the door is being closed to. release said actuating plate.

In testimony whereof I aifix my signature in presence of two witnesses.

EWALD riinnnnnnnoy WVit-nesses: I i

' Fnnn Ki'i'rr onn,

K RT h lr'iLLnR. 

